"Featured Guest" seems to be a category of guest only for InConJunction, though a few others (e.g., Convolution 2013 and CONduit XV) seem to have used it similarly.

First used by InConJunction in 1996, by a decade later this designation was being applied to more than a half dozen people on the guest list in addition to a large complement of standard GoHs. so for InConJunction, Fancyclopedia 3 consequently does not treat this as a GoHship but more as a headlined program participant.